Hollow needlelike object and method for manufacturing hollow needlelike object

Abstract

According to one embodiment, a method for manufacturing a hollow needlelike object including a hollow part inside includes: a step of preparing a first needlelike-object base having a face comprising a groove forming at least a part of the hollow part; and a step of covering the face of the needlelike-object base with a covering member.

The invention claimed is: 
     
       1. A method for manufacturing a hollow needlelike object comprising a hollow part inside, the method comprising:
 preparing a first needlelike-object base that includes a half needlelike object part having a longitudinal axis, a sharp distal end and a wide proximal end positioned along the longitudinal axis and a tapered intermediate side surface between the sharp distal end and the wide proximal end, a base plate part provided on a wide bottom end of the half needlelike object part, and a flat face extending along the longitudinal axis of the half needlelike object part on the half needlelike object part and the base plate part, the flat face comprising a groove forming the hollow part, extending from the base plate part to an intermediate part of the half needlelike object part, bent in a lateral direction, and having an outlet in the tapered intermediate side surface; and 
 covering the flat face of the needlelike-object base with a covering member. 
 
     
     
       2. The method for manufacturing a hollow needlelike object according to  claim 1 , wherein the covering member is a second needlelike-object base which forms the hollow needlelike object in combination with the first needlelike-object base or a sheet member which forms the hollow needlelike object in combination with the first needlelike-object base. 
     
     
       3. The method for manufacturing a hollow needlelike object according to  claim 1 , wherein the base plate includes a back face that is opposite to the half needlelike object part and the groove in the base plate part is opened in the back face of the base plate part. 
     
     
       4. The method for manufacturing a hollow needlelike object according to  claim 1 , wherein the first needlelike-object base has a structure in which a plurality of half needlelike object parts are arrayed in a row on the base plate part and a plurality of covering members are arrayed In a row, and a plurality of hollow needlelike objects arrayed in a row on the base plate part are obtained by covering the flat faces of the half needlelike object parts with a plurality of covering members. 
     
     
       5. The method for manufacturing a hollow needlelike object according to  claim 1 , wherein the needlelike-object base and the covering member are made of a biodegradable material. 
     
     
       6. The method for manufacturing a hollow needlelike object according to  claim 1 , further comprising performing a surface treatment at least on a surface of the groove of the first needlelike-object base. 
     
     
       7. The method for manufacturing a hollow needlelike object according to  claim 1 , wherein the groove is branched in the base plate and the branched grooves extend in a lateral direction in the base plate. 
     
     
       8. The method for manufacturing a hollow needlelike object according to  claim 2 , wherein the second needlelike-object base includes a half needlelike object part having a longitudinal axis, a sharp distal end and a wide proximal ends positioned along the longitudinal axis and a tapered intermediate side surface between the sharp distal end and the wide proximal end,
 a base plate part provided on the wide bottom end of the half needlelike object part, and 
 a flat face extending along the longitudinal axis of the half needlelike object part on the half needlelike object part and the base plate part, and 
 the base plate parts of the first needlelike-object base and second needlelike-object base are provided with an engagement structure for aligning joining positions of the base plate parts of the first needlelike-object base and second needlelike-object base. 
 
     
     
       9. The method for manufacturing a hollow needlelike object according to  claim 8 , wherein the engagement structure includes a concave engagement part provided on one of the base plate parts of the first needlelike-object base and second needlelike-object base and a convex engagement part provided on the other of the base plates of the first needlelike-object base and second needlelike-object base. 
     
     
       10. A hollow needlelike object manufactured by the method for manufacturing a hollow needlelike object according to  claim 1 . 
     
     
       11. A hollow needlelike object comprising a hollow part inside, comprising:
 a first needlelike-object base including:
 a half needlelike object part having a longitudinal axis, a sharp distal end and a wide proximal end positioned along the longitudinal axis and a tapered intermediate side surface between the sharp distal end and the wide proximal end, 
 a base plate part provided on a wide bottom end of the half needlelike object part, and 
 a flat face extending along the longitudinal axis of the half needlelike object part on the half needlelike object part and the base plate part, the flat face comprising a groove forming the hollow part, extending from the base plate part to an intermediate part of the half needlelike object part, bent in a lateral direction, and having an outlet in the tapered intermediate side surface; and 
 
 a covering member joined to the first needlelike-object base and covering the flat face of the first needlelike-object base. 
 
     
     
       12. The hollow needlelike object according to  claim 11 , wherein the covering member is a second needlelike-object base which forms the hollow needlelike object in combination with the first needlelike-object base or a sheet member which forms the hollow needlelike object in combination with the first needlelike-object base. 
     
     
       13. The hollow needlelike object according to  claim 11 , wherein the base plate includes a back face that is opposite to the half needlelike object part and the groove in the base plate part is opened in the back face of the base plate part. 
     
     
       14. The hollow needlelike object according to  claim 11 , wherein the first needlelike-object base has a structure in which a plurality of half needlelike objects are arrayed in a row on the base plate part and a plurality of covering members are arrayed in a row, and a plurality of hollow needlelike objects arrayed in a row on the base plate part are obtained by covering the flat faces of the half needlelike object parts with a plurality of covering members. 
     
     
       15. The hollow needlelike object according to  claim 11 , wherein the groove is branched in the base plate and the branched grooves extend in a lateral direction in the base plate. 
     
     
       16. The hollow needlelike object according to  claim 12 , wherein the second needlelike-object base includes a half needlelike object part having a longitudinal axis, a sharp distal end and a wide proximal ends positioned along the longitudinal axis and a tapered intermediate side surface between the sharp distal end and the wide proximal end,
 a base plate part provided on the wide bottom end of the half needlelike object part, and 
 a flat face extending along the longitudinal axis of the half needlelike object part on the half needlelike object part and the base plate part, and 
 the base plate parts of the first needlelike-object base and second needlelike-object base are provided with an engagement structure for aligning joining positions of the base plate parts of the first needlelike-object base and second needlelike-object base. 
 
     
     
       17. The hollow needlelike object according to  claim 16 , wherein the engagement structure includes a concave engagement part provided on one of the base plate parts of the first needlelike-object base and second needlelike-object base and a convex engagement part provided on the other of the base plates of the first needlelike-object base and second needlelike-object base.